can: mcp251x: get regulators optionally

The regulators power and transceiver are optional. If those are not
present, the pointer (or error pointer) is correctly handled by the
driver, hence we can use devm_regulator_get_optional safely, which
avoids regulators getting created.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/spi/mcp251x.c b/drivers/net/can/spi/mcp251x.c
index 3b2f34e..b7e83c2 100644 (file)
--- a/drivers/net/can/spi/mcp251x.c
+++ b/drivers/net/can/spi/mcp251x.c
@@ -1086,8 +1086,8 @@ static int mcp251x_can_probe(struct spi_device *spi)
        if (ret)
                goto out_clk;
 
-       priv->power = devm_regulator_get(&spi->dev, "vdd");
-       priv->transceiver = devm_regulator_get(&spi->dev, "xceiver");
+       priv->power = devm_regulator_get_optional(&spi->dev, "vdd");
+       priv->transceiver = devm_regulator_get_optional(&spi->dev, "xceiver");
        if ((PTR_ERR(priv->power) == -EPROBE_DEFER) ||
            (PTR_ERR(priv->transceiver) == -EPROBE_DEFER)) {
                ret = -EPROBE_DEFER;